Graduated release-brake.



W. V. TURNER. GRADUATED RELEASE BRAKE. APPLICATION FILED 110mm, we?.

9659@ l Patented July 26,1910.

Y? 359% Lz* Aut'y.

valves to be shifted to the release position. In this position'the ports 2O and 22 register with tra-in pipe passage 19 and release reservoir passage 22, respectively, and are connected by' cavity 21 in the aiuxiliaryvslide valve, so that fluid ervoir at the standard pressure is the train pipe. vIn this manner pipe pressure is increased, thereby assisting lothe. prompt movement, of the succeeding triple valverto release position, so that the serial action yof' the triple valves throughout the train is hastened and a more positive action thereof is obtained.

.y In the release position, the supplemental i'iese'rvoir port 10 registers with the through port 18 in the main'slide valve,'so that air flows from the supplemental reservoir to` the auxiliary reservoir, increasing the pressure 20 on the auxiliary reservoir side ofl the pistony suliiciently to shift; the 'saine outwardly and with it the auxiliary valve 17,-which thereupon closes the supplemental reservoir port 10, the release reservoir port 11 and brake cylinder port, thereby cutting off the, further release of air from the brake cylinder'. Further grading down of the pressure in the brake cylinder may be effected in a simivlar manner, it desired, as will be readily understood. y I may in some cases charging such vented to the train provide a direct passage for the release reservoir,

as tlielpassage 30, connecting the train pipe passage 3 with the passage 1l, leading to the release reservo-ir, the passage being`l provided with a. cheek valve 3L to prevent .back flow of air'from the release reservoir to -the tra-in pipe.

It will now be apparent that I have'pro- 40 vided simple and efticientv means whereby graduated release of the brakes on long rains may be readily obtained throughout the train. l y

Though I prefer to employ a separate reservoir for increasing .the train` pipe pressure, I may, in some' cases, utilize a single reservoir or other source of' pressure for sup# plying fluid to the opposite sides of the .abut-ment 14.

My invention may be applied to various other constructions adapted to graduate the release of the brakes, and the auxiliary valve may be dispensed with, if' desired, though by its use a more sensitive device is obtained,

5' lafHaving now described my invention, what I claim as new and desire to secure by Letters Patent is l. In a fluid pressure brake, the combination with a train pipe and brake cylinder, of avvalve device operated by an increase in train pipe pressure for first opening and then closing the exhaust 'trom the brake cyl- Il said abutment.

inder and local pressure on the f'igflevice.

means for increasing the train pipe lside of said valve l stored in the release res- 'ing movable abutment vand the admission oi. fl

` esame vice, for increasing the train pipe pressure and for closing the brake cylinder' exhaust port.

4. In a fluid pressure brake, the combina tion with a train piper,l br: ke cylinder, aux! iliary reservoir and a supplemental reservo' or source of paessure, of a valve device ha operated by variations iii train pipe pressure, valve means ae.- tuated by said abutment toifcontrolling the, release of air troni. the brake cylinder, for increasing the pressure on the train of said abutment,eand forsupiilying airfroin said supplemental reservoir to the other side of the abutment to cut oft the release ofl air :from the bra-lie cylinder.

5. lnz'id'flui'f'l pressure brake, the combination -with ajt-iain pi'pe, brake cylinder, auxiliary reservoir and a supplemental reservoir 'or source of pressure, of. a valve device ha vingl a niovabli ibutnient, and valve means operated ly said abutment upon an incr `ase in train pipe pressure, for releasing air from the brake cylind fr," 'for supplyingair to the train pipe side of said abutment', and for opening comi'nunieation from said supplemental reservoir to the other side of said abutment] to cut otf the release of air from the brake cylii'ideiz t5. In a 'fi uid pressure brake, the combination with a t ain pipe and brake cylinder, of a valve device having a movable abutment operated by variations in train pipe pressure, a main valve and an auxiliary falve actua-ted by said abutment for controlling the release of air trom the brake cylinder, uid under pressure to the opposite sides et' said abutment..

i'. ln a fluid pressure brake, the combina tion with a train pipe and brake cylinder, ot a valve device having a movable abutment operated by variations in train pipe pressure, a. main valve, and an auxiliary valve having a movement relative to said main valve, said valves being actuated by said abutment for controlling the release ot air Vliroin the brake cylinder and for increasing the fluid pressure on tllie opposite .sides oli S. ln a fluid pressure brake, the combination w itli a` train pipe` brake cvlindei, sup-- ple-mental reservoir and an additional source pipe sido,

izov

of iuid pressure, of a, valve device operated hy variations in fluid )rassure for controlling the release of air rom the brake cylindcr and comniuiiicaticn from said additional vsource tc the train pipe side, and from said ytrain pipe pressure, a main valve actuated by said abutment and an auxiliary 'valve actuated thereby for controlling tlierelease of fluid from the brake cylinder and communication from said additional source tu www ni the train pipe side of seid abutment :incl from said supplemental reservoir m the 01pposite side of said abutment.

10. ln a fluid pressure brake, the @fimininetion with :i brake cylinder, Weir@ meen@ operating upon a graduated increase in trein pipe pressure for releaeing nir from the brake cylinder and for Supplying air to the train pipe, and means for returningrnnid valve means to eut off the release of from the brake cylinder. f t

In testimony Wherenit li here heremlto @et my hand. i

f @WALTER V. TURNER. l Witnesses:V R. l?. lElMnnir,

WM. M. GAM. 

